How to disable clickable the form with Dropzone.js?

Why do not you just use CSS to disable the click event. When max files is reached, Dropzone will automatically add a class of dz-max-files-reached.

Use css to disable click on dropzone:

.dz-max-files-reached {
  pointer-events: none;
  cursor: default;
}

This works PERFECTLY!!! and works on 4.0.1

//disable the click of your clickable area
$(".dz-hidden-input").prop("disabled",true);

//enalbe the click of your clickable area
$(".dz-hidden-input").prop("disabled",false);